Just for curiosity, I typed "portraits 16th century" into Google images, and it was quite astonishing. Some of the paintings are incredibly "photographic" and very attractive.
I chose the earlier one because it was pained by someone who had been taught by Nicolao, and would therefore be likely to have a similar style. But his painting was not done from "life" and that might account for at least some of the non-realism.
Another thing from Google images... is the complete lack of any other online representations of any other pictures attributed to Giovanni Nicolao. That Oda Nobunaga picture comes up a lot... but nothing else by that artist.
David Noble
Shorinji Kempo (1983 - 1988)
I'll think of a proper sig when I get a minute...
For now, I'm just waiting for the smack of the Bo against a hard wooden floor....